JPH0140440B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape cassette mounting device for a magnetic recording/reproducing device, and an object of the present invention is to provide a tape cassette mounting device for a magnetic recording/reproducing device, and an object of the present invention is to provide a tape cassette mounting device with a simple structure that allows the tape cassette to be mounted on the tape cassette when the tape cassette lid provided on the tape cassette is closed. It can effectively prevent the magnetic tape stored inside the tape cassette lid from being damaged.
It is an object of the present invention to share an excellent tape cassette mounting device.

Generally, a tape cassette mounting device has a recess for holding the tape cassette in a cassette holder whose one end is pivoted on the main body of the device, and the tape cassette is manually operated with the tape cassette stored in the recess. Pushing the tape cassette into a tape cassette insertion opening provided in the device main body, loading the tape cassette onto a reel stand provided in the device main body,
The cassette holder is moved by an issue operation to take out the tape cassette from the loading position on the reel stand.

The above-mentioned tape cassette is constructed by loading a pair of reels wound with magnetic tape inside the cassette body, and the reels are loaded into a reel stand provided inside the device body to perform predetermined operations. It is. Therefore, in the operating position, in order to maintain smooth rotation of the reel, a predetermined amount of clearance (margin) is formed between the reel and the inside of the cassette body.

In the above-mentioned tape cassette loading device using such a tape cassette, if the tape cassette itself is tilted while the tape cassette is stored in the cassette holder, the reel of the tape cassette will not engage with the reel stand on the device main body side. comes off and the reels fall by the gap (margin) secured between the pair of reels rotatably supported within the tape cassette and the inside of the cassette body, and as a result, the magnetic field wound between the reels drops. The tape slackens and protrudes into the opening at the end of the tape cassette, especially when a pair of reels are rotatably supported in the tape cassette, such as in a video tape recorder, and the tape is large enough to be connected to the reel stand of the main body of the device. In the case where a margin was provided, the amount of the magnetic tape protruding from the end opening of the tape cassette was increased. Moreover, in order to open and close the end opening of a tape cassette for a video tape recorder, the tape cassette lid extends in the width direction of the tape cassette body and is rotatably supported in the thickness direction of the tape cassette body. If the tape cassette lid is closed when a tape cassette stored in the tape cassette is removed, the magnetic tape protruding from the opening at the end of the tape cassette body may be caught between the tape cassette body and the tape cassette body, causing damage by bending the magnetic tape. There was a problem.

The present invention eliminates such conventional drawbacks, and the present invention will be described below with reference to drawings of embodiments.

The drawings show one embodiment of the present invention, and in the drawings,
Reference numeral 1 designates a tape cassette, in which both ends of a magnetic tape are attached between a pair of reels rotatably mounted inside a cassette case body 1a, and the magnetic tape is wound and stored on each of the pair of reels. be. A cassette case lid 1b for opening and closing the end opening of the cassette case body 1a extends in the width direction of the cassette case body 1a and is rotatably attached in the thickness direction of the cassette case body 1a. Reference numeral 2 denotes a substantially U-shaped holding member for holding the tape cassette 1, and a sliding shaft 22 is provided protruding from the surfaces of both side plates 2a, 2a.
Further, an auxiliary member 23 having an inverted L-shaped cam groove 23a is attached to the surfaces of the side plates 2a, 2a. Further, through holes 24 are provided in the main plate 2b of the support member 2 so as to correspond to each of the pair of reels of the tape cassette 1. As shown in FIG. 4, the through hole 24 enters a through hole 30 provided on the back side of the case body 1a of the tape cassette 1, and the reel 3 rotatably supported by the case body 1a is inserted into the through hole 24.
A retaining ring 32 into which 1 is inserted is arranged,
This retaining ring 32 is held by a leaf spring 33, and one end thereof is attached to the back surface of the main plate 2b of the retaining member 2. The retaining ring 32 is located in the through hole 24 provided in the retaining member 2 and partially protrudes toward the front side, and the protruding portion has a tapered surface that widens toward the insertion opening side of the tape cassette 1. are doing. Reference numeral 3 designates a support member for supporting the tape cassette 1. A support shaft 4 is provided protrudingly at the tip of an arm portion 3a, and a sliding shaft 22 provided on the holding member 2 is slid on the main plate portion 3b. A guide elongated hole 26 and a substantially doglegged cam groove 27 are provided for this purpose.
Although not shown, it goes without saying that the support member 3 is provided so as to face both side plates 2a, 2a of the holding member 2, respectively. The support member 3 is supported by the device main body 16 so as to be rotatable about the support shaft 4. Therefore, the holding member 2 is linearly slidable with respect to the supporting member 3, and is configured to be freely rotatable with respect to the device main body 16 by means of the supporting member 3. 5 is a drive arm, which has a drive shaft 25 at its tip that passes through a cam groove 27 provided in the support member 3 and engages with a cam groove 23a provided in the holding member 2; It has a shaft 6.
This drive arm 5 rotates together with a rotation shaft 6 provided at the other end, and moves the holding member 2 and the support member 3 according to the cam grooves 27 and 23a. 7 is a motor mounting plate provided in the device body 16, and this motor mounting plate 7 has a drive motor 8, a worm gear 9, and transmission gears 10, 1.
1 and a drive gear 12 are attached. The power of the drive motor 8 is transmitted to the worm gear 9 via a transmission belt 15 installed between a motor pulley 13 attached to its main shaft and a driven pulley 14 attached to the shaft of the worm gear 9. The drive shaft 6 to which the drive gear 12 is attached is transmitted to the drive gear 12 via the first transmission gear 10 meshing with the first transmission gear 10 and the second transmission gear 11 meshing with the first transmission gear 10. The drive arm 5 is rotated by rotating the drive arm 5. 17 is a cassette lid;
A base 28 is provided protruding from both sides of the rear surface. The cassette lid 17 has the base 28 fastened to the main plate 3b of the support member 3 with screws 29. Reference numeral 18 denotes a light receiver attached to one side of the support member 3, and constitutes an optical detection switch with a light emitting device such as a lamp attached to the other support member (not shown). 1
A cam piece 9 rotates together with the second transmission gear 11, and is adapted to turn on and off a switch 20 provided near the second transmission gear 11. Reference numeral 21 denotes an opening provided in the device main body 16 for inserting a tape cassette.

In the tape cassette mounting device having such a structure, when the tape cassette 1 is inserted into the recess provided between the support member 2 and the cassette lid 17 from the direction of arrow C as shown in FIG. , the retaining ring 32 attached to the back surface of the retaining member 2 by a leaf spring 33 and located in the through hole 24 moves as shown by the arrow B due to the elasticity of the leaf spring 33 itself.
direction to facilitate insertion of the tape cassette 1. When the tape cassette 1 is inserted into the recess and the reel 31 enters the retaining ring 32, the retaining ring 32 returns to its original position by the elasticity of the leaf spring 33 itself, and It is engaged with a reel 31 rotatably supported within the tape cassette 1. At this time, the reel 31 is inserted into the retaining ring 32 in the middle of the through hole 30 provided on the back side of the case body 1a of the tape cassette 1.
The reel 31 is held by the reel 31 to prevent it from falling further due to its own weight.

When the insertion of the tape cassette 1 into the recess is detected by an optical detection switch consisting of a light receiver 18 or the like, the drive motor 8 is operated and the drive arm 5 is rotated in the direction of arrow D. When the drive arm 5 is rotated in the direction of arrow D, the drive shaft 25 provided at the tip of the drive arm 5 moves into the dogleg-shaped cam groove 27 provided in the support member 3.
The drive shaft 25 moves along the inner arcuate portion, and at this time, the drive shaft 25 moves through the inverted L-shaped cam groove 2 provided in the holding member 2.
3a, the holding member 2 is moved downward along the guide slot 26 of the supporting member 3, and the tape cassette 1 held by the holding member 2 is moved by its own weight. It falls in the direction of arrow C shown in the figure. This dropping operation of the tape cassette 1 continues until the drive arm 5 moves to the position 5' shown by the broken line in FIG. 1, and the tape cassette 1 moves to the position 1' shown by the broken line in FIG.
During this time, the support member 2 does not rotate at all because the arc-shaped portion of the cam groove 27 is formed approximately equal to the rotation locus of the drive shaft 25 about the drive shaft 6. Then, due to the rotation of the drive arm 5, the drive shaft 25 at the tip of the drive arm 5 moves into the cam groove 27,
23a at each bent position. When the drive arm 5 is further rotated in the direction of arrow D in the figure, the drive shaft 2 provided at the tip of the drive arm 5
5 presses the straight portions of the cam grooves 27 provided on the support member 3 and the cam grooves 23a provided on the holding member 2, and the support member 3 and the holding member 2 are rotated about the spindle 4 in the direction of arrow E in the figure. The tape cassette 1 held by the tape cassette 1 is taken into the device main body 16 as shown in FIG. The operation is completed. In the loading operation of the tape cassette 1 to the reel stand, the case lid 1b of the tape cassette 1 contacts the locking pin provided in the device main body 16 and is expanded, and is transferred to the next tape loading operation. The magnetic tape is brought into contact with the recording/reproducing head.

On the other hand, when removing the tape cassette 1, the drive motor 8 is reversely rotated by operating an eject button (not shown), and the drive arm 5 is rotated in the direction opposite to the direction of arrow D in the figure.
The support member 3 is rotated in the direction opposite to the arrow E shown in the figure by the drive shaft 25 at the tip. Prior to this operation, the tape loading mechanism returns to its original position and winds the magnetic tape into the tape cassette 1. Further, when the tape cassette 1 returns to rotation, the case lid 1b of the tape cassette 1 is closed, but the reel 31 of the tape cassette 1 engages with the retaining ring 32 provided on the retaining member 2, and the reel 3
Since the amount of magnetic tape that falls is limited by the weight of tape cassette 1 itself, the amount of magnetic tape that protrudes into the end opening of tape cassette 1 is small, and when the case lid is closed, the magnetic tape is sandwiched between it and case body 1a. It cannot be bent and damaged. Then, the drive arm 5 rotates to the position indicated by the broken line 5' in FIG. Tape cassette 1 moved in the direction opposite to the direction of arrow C shown in the figure and held there.
push up. Therefore, since the upper end of the tape cassette 1 protrudes from the holding member 3,
Easy to pull out. When the drive arm 5 moves to the solid line position in FIG.
The cam piece 19, which rotates integrally with the tape cassette 1, operates the switch 20 to stop the drive motor 8, thereby completing the ejecting operation of the tape cassette 1. In addition,
Although not shown, a first transmission gear 10 provided between the worm gear 9 and the second transmission gear 11 has a large gear that meshes with the worm gear 9 and a small gear that meshes with the second transmission gear 11. Since a friction clutch is provided between the large and small gears, the power transmitted by the drive motor 8 can be regulated against an excessive load at the rotation end position of the drive arm 5. , a timing shift of the cam piece 19 can be effectively prevented.

In addition, in the above embodiment, the cam groove 2 of the support member 3
7 is formed in a substantially dogleg shape so that the support member 3 rotates after the linear movement of the holding member 2. In addition, the cam groove 27 is also formed in a linear shape to allow the linear movement of the holding member 2. It is also possible to configure the support member 3 to rotate at the same time.

Further, although the holding member 2 is configured to be linearly slidable with respect to the supporting member 3, the holding member 2 may be fixed to the supporting member 3, and may be attached and removed by a drive motor. Needless to say, the present invention can also be applied to manually loading and unloading tape cassettes.

Further, the retaining ring 32 may have a protruding piece that receives the lower end of the outer periphery of the reel 30 of the tape cassette 1 instead of having a ring shape.

As described above, according to the present invention, there is provided a support member for loading and unloading the tape cassette into and from the reel stand of the main body of the device while holding the tape cassette, and the tape cassette holding portion of the support member is Since a holding member is provided that engages with the reel of the tape cassette and regulates the weight of the reel itself to fall, the reel provided in the tape cassette can be removed when the tape cassette is taken out from the loading position on the reel stand. By regulating the fall of the magnetic tape under its own weight, it is possible to prevent the amount of magnetic tape from protruding into the end opening of the tape cassette. In particular, in devices such as video tape recorders that have an opening/closing lid on the end opening of the tape cassette, when the opening/closing lid is closed, the magnetic tape protruding from the opening/closing lid itself may be bent and damaged. This can be effectively prevented.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the tape cassette loading device of the present invention, FIG. 2 is an explanatory diagram of its operation,
FIG. 3 is an exploded perspective view of a main part of the same device, and FIG. 4 is an enlarged sectional view of a main part of the same device. 1... Tape cassette, 2... Holding member, 3...
...Supporting member, 21...Opening, 32...Retaining ring, 33...Plate spring.

Claims (1)

[Scope of Claims] 1. A support member pivotally connected to a device body and movably provided in an opening for inserting a tape cassette provided in the device body, and a state in which the support member is provided to hold the tape cassette. and a holding part provided on the main body of the device for loading and unloading the reel in accordance with the movement of the support member, and a holding part provided on the tape cassette holding part that engages with the reel of the tape cassette to reel the tape cassette. A tape cassette mounting device characterized by comprising a regulating member for regulating the fall of the tape cassette by its own weight. 2. Claim 1, characterized in that the regulating means is a retaining ring that is disposed in a through hole provided in the tape cassette holding section for passing through the reel stand, and that is elastically attached to the tape cassette holding section. The tape cassette mounting device described. 3. The retaining ring is provided so as to protrude into the tape cassette retainer from a through hole for insertion of the reel stand provided in the tape cassette retainer, and the protruding portion is provided with a tapered surface that widens toward the tape cassette insertion opening of the retainer. A tape cassette mounting device according to claim 2, characterized in that: